Incident affecting login via custom domains

Incident Report for OutSystems

Postmortem

On January 16th, a service change related to an ongoing migration caused a temporary issue where customers were unable to log in using their custom domains. Our engineering team immediately identified the cause and implemented a mitigation to resolve the issue quickly by temporarily disabling the custom domain redirection feature. A controlled restart of system deployments was performed to expedite this fix.

To ensure stability and prevent recurrence, a technical recommendation has been made to enhance the system. This improvement will increase resilience to future updates and configuration changes, helping maintain continuous operation without service interruptions.

Posted Jan 27, 2026 - 11:49 UTC

Resolved

This incident is now fully resolved. If you continue to experience issues, please follow the steps shared in our previous communication.
Thank you for your patience and understanding.

Posted Jan 16, 2026 - 14:35 UTC

Monitoring

A solution has been applied to resolve the issue.
Customers who are still experiencing problems with newly configured custom domains should follow these steps:

1. Delete the affected custom domain in the ODC Portal.
2. Remove the corresponding CNAME entries from your DNS provider and wait ~5 minutes.
3. Recreate the custom domain in ODC Portal and add the new CNAME records.
4. Once the status shows Active, try logging in again.

If you continue to experience issues after following these steps, please contact us via Support Portal.

We will continue monitoring the situation to ensure full recovery and will provide updates if any further action is required.

Posted Jan 16, 2026 - 12:37 UTC

Identified

The cause of the issue has been identified, and a solution is being applied.

Customers may still experience an “invalid redirect URI” error when attempting to log in to an application using a newly configured custom domain.

Our team is actively working on the solution. We will provide an update once more details are available.

Posted Jan 16, 2026 - 11:46 UTC

Investigating

We are aware of an issue where customers are unable to log into applications. Customers may encounter an “invalid redirect URI” error when attempting to log in to an application using a newly configured custom domain. Our team is currently investigating the cause of this issue and will provide updates as more information becomes available.

Posted Jan 16, 2026 - 10:13 UTC

This incident affected: ODC - Identity & Access Management (Europe / Ireland, Europe / London, Asia Pacific / Seoul).